Combination instrument



Jun 9, 1931. DAEHLIN 1,809,?75

COMBINATION INSTRUMENT Filed Jan. 2, 1929 I Dale) Z Patented June 9,1931 UNITED: STATES PATENT OFFICE ISAAC DAEHLIN, or rnnnroitir; ILnINoIsCOMBINATION INSTRUMENT Application filed. January 2, 1929. Serial No.329,834.

termined.

Another object of the invention is to provide an instrument of thisnature constructed in such manner that it can be used as a pencilcompass.

Another object of the invention is to provide a device of this kindwhich is simple in construction, eificient in operation, durable, andone which can be manufactured at a small cost.

Another object of the invention is to provide a device of this characterwhich is easily and-quickly adjustable for performing various functions,the construction being such that it can be conveniently folded when 25not in use.

With these and other objects in view, this invention resides in thenovel features of construction, formation, combination and arrangementof parts to be hereinafter more fully described, claimed and illustratedin the accompanying drawings, in which Figure 1 is a side elevation ofthe device. 7

Figure 2 is an edge view.

Figure 3 is a reverse side View showing the legs in position forattachment of a pencil.

Figure 4 is a sectional view on line 14 of Figure 1. r Figure 5 is asectional view on line 5-5 of Figure 3.

Referring to the drawings, 1- designates a bar having a longitudinalslot 2 formed there in, said bar having its lower end terminating in acentering point 3, the upper end of said bar having a horizontally'disposed flange 4 carried thereby in which is formed a gauge opening 5.The bar is provided with a plurality of gauge openings 6, varying insize in order that the size of rivets or bolts can be quickly andaccurately determined.

Engaged on the bar 1 isa U-shaped slide 7,

the spaced plates 8 of which engage opposite sides of the bar, saidslide being retained upon the bar by a bolt 9 whichhas its fiat portion10 slidable in the. slot 2, said bolt passing throughthe side plates 8.A winged nut 11 is engaged upon the bolt in order that the slide can beheld in adjusted position upon the bar '1, when the occasion requires,it being obvious that when the nut is released the slide can movefreely.

Having their upper ends pivotally connected to the tons are legs 12,said legs being arranged upon opposite sides ofthe slide 1 in order thatthey can freely pass each other when swung in reverse directions.

'A pairoflinks 13 are provided and have their lower ends pivotallysecured to the 0pposite sides ofthe lower end of the bar 1 by a r thesingle pin as an axis, the upper ends of said links being pivotallyconnected intermediatethe ends of the legs 12, as at 15.

One of the legs12 is graduated, as at 16, so that the same can be usedas a rule, it being of course understood that the other leg is likewisegraduated.

The bar 1 is-inarkedwith suitable graduations 17 and 17 which cooperate,respectively, with the slide inorderithat the outside and insidediameters of an object can be quickly observedwhen the lowerends of thelegs are, properly set with respect to the object being gauged. Any wellknown system of graduation may be used for this purpose.

The lowerends of the legs 12 are curved slightly, and terminate inpoints 18, and 0wing to this curvature the points will at all times bein positionpior accurate disposition upon the article gauged. v 1 a I Asshown in full li' es in Figure 1, the legs 12'are in position to permitthe instrument pin 14 whereby the links' may be pivoted on to be used asan outside caliper, and to also the position, as shown in. dottedlinesin Fig urell, and at which time the-instrument may beused as aninsidec'alipe'r.

Obviously when the legs are swung for use the slide will move upon thebar, and a reading can be made of the graduations to denote the diameterof the object, the upper edge of said slide serving as an indicator.

As shown in Figure 3 both legs 12 have been swung into parallelrelationship upon one side of the bar 1, and when in this position theinstrument can be effectively used as a compass. Vhen this is desired aresilient clamp 19 is engaged upon either of the legs 12 and heldclamped thereon by the bolt 20, the point 3 obviously serving as apivotal point for the instrument. The arms of the clamp are providedwith aws 21 for clamping a pencil 22, the point of which being arrangedadjacent the point 18 of the leg. If desired each leg may be suppliedwith a pencil holding clamp, said clamps being necessarily secured tothe leg at dillerent elevations in order that a double line can bedrawn.

It is thought that the operation and advan tages of the herein describedinvention will be apparent to those skilled in the art without furtherdescription.

The bar 1 is also provided with graduations 23 upon its reverse side, inorder that when the instrument is laid on the paper and the slide 7 isclamped or set opposite a selected graduation lines can then be drawnalong the outer edgesv of the legs 12. The instrument is then removedand the disconnected ends of the lines, due to presence of the slide 7,can be completed. In this manner angles can be drawn for'10 to 165.

Vhat is claimed is 1. An instrument of the class described comprising abar, a slide movable longitudinally of the bar, legs having their upperends pivotally connected with the slide and arranged upon opposite sidesof the bar, and links pivotally connecting the bar and legs, said linksbeing pivoted to the bar on opposite sides and about a single axis, saidlegs and links being adapted to move past each other to opposite sidesof the bar to adjust the legs to measure inside or outside dimensions.

2. An instrument of the class described comprising a bar having alongitudinal slot therein, a slide, a bolt engaged with the slide andmovable in the slot, legs disposed on opposite sides of the bar andhaving one of their ends pivotally connected to the bolt, and links Ipivoted to the bar on opposite sides and about a single axis andpivotally connecting the bar and legs for moving the legs simultaneouslyduring movement of the slide, said legs being swingable on said pivotbolt to pass each other and reverse their positions on opposite sides ofthe bar for measuring inside or outside dimensions. V

3. An instrument of the class described comprising a bar having alongitudinal slot formed therein, a U-shaped slide including side platesfor engaging the opposite sides of the bar, a bolt engaged in the platesand movable in the slot, a pair of legs arranged upon opposite sides ofthe bar and having their upper ends pivotally connected with the bolt,said legs being curved outwardly at the free ends, and links pivotallyconnecting the bar and legs, said links being pivoted to the bar onopposite sides and about a single axis, said legs being adapted to beswung past each other to reversed positions on opposite sides of saidbar to measure inside or outside dimensions.

In testimony whereof I afiix my signature.

ISAAC DAEHLIN.

